First off, let me say thanks for the time and sorry if this question has been asked already, but the solutions I've been seeing haven't worked. I have a Vizio E3D420VX and it's around two years old. One day I pressed power and nothing worked. So far I've tried:

- different power sources/using no surge protector
- held power key down for a while/tried unplugging tv for a while
- replaced power cord
- searched for bad capacitors on the power board
- completely replaced the power board

After all this it still has no power, not even the LED light on the front. Any more input or suggestions would be greatly appreciated!